Thank Ken,
But this is not what I want. I would like to truncate the hour.
So 
t1:  201561222 -> 2008-01-28 15:00:22
and I want
t2 ?                 -> 2008-01-28 00:00:00
So I want to find out t2? which has no hour number.
Thanks
JP

----- Original Message ----
From: Ken <[EMAIL PROTECTED]>
To: [email protected]
Sent: Wednesday, January 23, 2008 10:35:03 AM
Subject: Re: [sqlite] How to truncate the hour fraction

assuming your time is in seconds.
  try 

t1:  201561222 -> 2008-01-28 15:00:22
and you want 
t2:  1201561200      -> 2008-01-28 15:00:00

  t1 = t2 - (t2 mod 3600)

  

Joanne Pham <[EMAIL PROTECTED]> wrote: Hi All,
I have a hour table which has the startTime are stored at GMT time. The 
startTime of this hour table has the values below:
Hour table
-----------
StartTime            equivalent with the time format
1201561200      -> 2008-01-28 15:00:00
1201590000      -> 2008-01-28 23:00:00
1201590000      -> 2008-01-28 23:00:00
1201590000      -> 2008-01-28 23:00:00

I want to aggregate the data from hour table and store them in weekly table and 
startTime should not have
any hour fraction. Is there any function to truncate all the hour fraction.
Thanks,
JP


      
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